A K-band microwave spectrometer for studying atmospheric reactions

Medcraft, Chris

Permalink

https://hdl.handle.net/2142/104305 Copy

Description

Title

A K-band microwave spectrometer for studying atmospheric reactions

Author(s)

Medcraft, Chris

Issue Date

2019-06-21

Keyword(s)

Atmospheric science

Date of Ingest

• 2019-07-15T22:16:37Z
• 2020-01-25T19:31:16Z

Abstract

A segmented Chirped Pulse Fourier Transform Microwave (CP-FTMW) spectrometer has recently been installed in the Molecular Photonics Laboratories at UNSW Sydney. It covers the K-band (18-26 GHz) with an 18 MHz per segment bandwidth. This frequency range permits probing samples at room temperature and in a supersonic expansion. The stable products of atmospheric oxidation reactions of biological and anthropogenic volatile organic carbons (VOCs) will probed in a room temperature cell. Reactive and transient species will be probed in a supersonic expansion using a custom discharge mixing nozzle. The nozzle combines a standard high voltage discharge source with a secondary source introduced into the expansion via a capillary gas line. This secondary source is pulsed to reduce gas load and improve sample density. Performance and preliminary results will be presented along with supporting \textit{ab initio} calculations.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Genre of Resource

Conference Paper / Presentation

Language

eng

Permalink

http://hdl.handle.net/2142/104305

DOI

https://doi.org/10.15278/isms.2019.FB03

Copyright and License Information

Copyright 2019 Chris Medcraft

Owning Collections